| To: | Emmanuel Florac <eflorac@xxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: High latencies writing to a memory mapped file |
| From: | Matthias Schniedermeyer <ms@xxxxxxx> |
| Date: | Tue, 27 Jul 2010 13:27:00 +0200 |
| Cc: | Shawn Bohrer <shawn.bohrer@xxxxxxxxx>, xfs@xxxxxxxxxxx |
| In-reply-to: | <20100727124750.30bb3209@xxxxxxxxxxxxxxxxxxxx> |
| References: | <20100722144706.GA2840@xxxxxxxxxxxxxxxxxxxxxxxxx> <20100727092452.GA23307@xxxxxxx> <20100727124750.30bb3209@xxxxxxxxxxxxxxxxxxxx> |
| User-agent: | Mutt/1.5.19 (2009-01-05) |
On 27.07.2010 12:47, Emmanuel Florac wrote: > Le Tue, 27 Jul 2010 11:24:52 +0200 > Matthias Schniedermeyer <ms@xxxxxxx> écrivait: > > > In case anybody has an idea what i could do to identify and/or > > isolate the root-cause, i'm open for suggestions. > > > > I'd thought that the io scheduler is the culprit. I've generally found > that the default CFQ scheduler (default) is terrible for file servers. I have 'deadline'ed the server, if that is the culprit then i will "know" in about a month. (As i don't know how to force the problem i can only wait for the problem not to happen. :-| ) Bis denn -- Real Programmers consider "what you see is what you get" to be just as bad a concept in Text Editors as it is in women. No, the Real Programmer wants a "you asked for it, you got it" text editor -- complicated, cryptic, powerful, unforgiving, dangerous. |
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